I found this interesting report by AppSumo on How to Grow Your User Base. I still didn’t read it, but it seems very interesting and I’ll start reading it tonight. You can download it for free from the link below:
There is a small trick, you need first to send a tweet about the report to be able to get access to the free download. And I think you should use your desktop to be able to get access, your mobile will not work.